The Atrocity Archives by Charles Stross

Have a computer science Lovecraft for you, The Atrocity Archives by Charles Stross. Basic premise, all the Lovecraft stuff is real, the use of complex mathematics creates connections to other dimensions and The Laundry is the British MI-5 for the occult. Bob, the protagonist, is a computer geek who works for The Laundry and is transition to field work. It is not as scary as Lovecraft’s writing but still very cool so far, I’m only about 1/2 the way into it.

And there is The Laundry RPG for Call of Cthulhu.